We invited visits and quotes from 5 installers, and, at the cheaper end of the panel spectrum, their prices were very similar (most provided 2 alternatives, but pushed for a particular brand). However, after listening to our anxieties regarding the visual impact of panels on the roof, ARP supplied four alternatives, including higher performance SunPower panels that no-one else offered to supply - opting for this meant that we would only need 12 panels, rather than the 16 we were quoted for by the other companies.
This was not the cheapest option, but we felt confident that, of all the people we met, ARP were the most attentive, paying more attention to detail when estimating, as well as being the most enthusiastic (without being at all 'pushy').
All the installation work was carried out smoothly and efficiently, as scheduled - scaffolding erected on the day prior to installation, panels and electrics in one day, scaffolding removed a couple of days later. The only hiccup came with the pairing of the panels to the inverter, but that was very quickly sorted out by ARP next morning.
I couldn’t fault ARP’s approach, their provision of all the details I requested, and not least, the standard of workmanship provided by their team.
SCB, Hexham, March 2015